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Finding the Fourth Proportional to 66,627.60, 99,912.24 and 19,871.16

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Solution

The fourth proportional to 66,627.60, 99,912.24 and 19,871.16 is: 29,798.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,627.60 : 99,912.24 = 19,871.16 : x
  2. Step 2: Convert to fraction form
    66,627.60/99,912.24 = 19,871.16/x
  3. Step 3: Cross multiply
    66,627.60x = 99,912.24 × 19,871.16
  4. Step 4: Simplify right side
    66,627.60x = 1,985,372,107.00
  5. Step 5: Solve for x
    x = 1,985,372,107.00/66,627.60
  6. Step 6: Final answer
    x = 29,798.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.